Question

Kyle rides his bike 6 miles in 30 minutes. Assuming he rides at a steady speed, write aproportion that could be used to determine how long it would take him to ride his bike 15miles.

Answer 1

We can solve it using the rule of three, so by writing down the rule of three we get

`\frac{6\text{ miles}}{30\text{ minutes}}=\frac{15\text{ miles}}{x\text{ minutes}}`

Do the cross multiplication

`\begin{gathered} 30\cdot15=6\cdot x \\ \\ \end{gathered}`

Solve it for x

`\begin{gathered} 450=6\cdot x \\ \\ x=(450)/(6) \\ \\ x=75\text{ minutes} \end{gathered}`

Then it would take 75 minutes to ride 15 miles